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Electrode dryer and method for drying electrode

a technology of electrode dryer and electrode sheet, which is applied in the direction of dryer with progressive movement, cell components, lighting and heating apparatus, etc. it can solve the problems of uneven coating of electrode sheet, etc., and achieve the effect of reducing uneven coating and stable production of electrodes

Inactive Publication Date: 2012-11-15
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]In view of the above-described problems, the present invention has been achieved to provide an electrode dryer and a method for drying an electrode that can prevent hanging and wrinkles of an electrode base material, and reduce uneven coating during drying to steadily provide even electrodes.
[0019]The present invention can prevent hanging and wrinkles of an electrode base material, and swing of the electrode base material due to hot air blown during drying to reduce uneven coating, allowing stable production of even electrodes.

Problems solved by technology

As a result, the electrode would greatly warp during the drying or the electrode base material 601 would be swung by hot air to result in an uneven electrode.
If dried while thus hanging down, the electrode sheet may warp or have uneven coating.
Furthermore, both the methods disclosed in the documents cannot exclude the possibility that the electrode base material (electrode sheet) made of a thin metal foil is wrinkled due to some reasons such as warm air blown in the drying step.

Method used

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  • Electrode dryer and method for drying electrode
  • Electrode dryer and method for drying electrode
  • Electrode dryer and method for drying electrode

Examples

Experimental program
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Effect test

embodiment 1

[0032]FIGS. 1A and 1B are schematic configuration diagrams of an electrode dryer 100 according to Embodiment 1. Specifically, FIG. 1A is a side view of the electrode dryer 100, and FIG. 1B is a view taken along a line A-A in FIG. 1A. The electrode dryer 100 mainly includes a drying furnace 2, support rollers 3, a coater 4 and a mounting member 7. The electrode dryer 100 is an apparatus that dries a band-like electrode base material 5 coated with an electrode slurry 6 as a coating material by the coater 4 while conveying the electrode base material 5.

[0033]The drying furnace 2 is in a box shape having openings at predetermined positions in opposite sides. The electrode base material 5 coated with the electrode slurry 6 on one surface is introduced to the drying furnace 2 through an entrance 21 provided in one side of the drying furnace 2 (left side in FIG. 1A), goes through a predetermined drying process in the drying furnace 2, and then conveyed out of the drying furnace 2 through a...

embodiment 2

[0050]Next, Embodiment 2 will be described. Embodiment 2 has the same general configuration as Embodiment 1 except for the shape of the mounting member.

[0051]FIG. 3 is a schematic configuration diagram of an electrode dryer 200 according to Embodiment 2 seen from a side. A mounting member 8 is composed of a plurality of metallic rollers 81 arranged planarly with their rotation axes oriented in the same direction, for example. The number of the metallic rollers 81 can be determined appropriately according to the conditions of the electrode base material 5 being conveyed.

[0052]FIG. 4 is a diagram illustrating a shape of each metallic roller 81. The radius r of the metallic rollers 81 can be determined in view of the fact that a too large radius results in a large gap between the electrode base material 5 and the metallic rollers 81 connected in series to fail in stable holding of the electrode base material 5, though it depends on the conditions of the electrode base material 5 being ...

embodiment 3

[0055]Next, Embodiment 3 will be described. Embodiment 3 has the same general configuration as Embodiment 1 and Embodiment 2 except for the shape of the mounting member.

[0056]FIG. 5 is a schematic configuration diagram of an electrode dryer 300 according to Embodiment 3 seen from a side. A mounting member 9 is made of a metallic plate, for example. Preferably, the plate has a plane surface and a width equal to or larger than the width of the electrode base material 5 in a direction perpendicular to the conveyance direction of the electrode base material 5. Since the plane having a width equal to or larger than the width of the electrode base material 5 allows stable holding of the electrode base material 5, the electrode base material 5 is prevented from hanging down or swinging due to hot air during the drying and from having uneven coating as a result. The mounting member 9 may also have the above-described suction mechanism.

[0057]As described above, the electrode base material 5 ...

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Abstract

An electrode dryer includes a drying furnace; anda conveyance member for longitudinally conveying a band-like electrode base material coated with a coating material from an entrance to an exit of the drying furnace, the drying furnace including an air-permeable mounting member for horizontally supporting the electrode base material to be conveyed in the drying furnace; and a suction member for sucking the electrode base material through the air-permeable mounting member.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is related to Japanese patent application No. 2011-106853 filed on May 12, 2011 whose priority is claimed under 35 USC §119, the disclosure of which is incorporated by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to an electrode dryer that is used in the production of electrodes and a method for drying an electrode.[0004]2. Description of the Related Art[0005]As electrodes of lithium-ion batteries and the like, those obtained by forming an electrode composite material on a surface of an electrode base material are used. The electrodes are produced by dispersing or dissolving a positive-electrode or negative-electrode active material and a binder in a wetting agent to prepare an electrode slurry, and applying and drying the electrode slurry on an electrode base material made of a metal foil using a coating and drying apparatus to form a positive-elec...

Claims

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Application Information

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IPC IPC(8): F26B13/30H01M4/04
CPCB05D3/0493B05D1/26B05D3/0254F26B13/10B05D2252/02Y02E60/122H01M4/139Y02E60/10
Inventor MATSUYAMA, TAKAHIRONISHIMURA, NAOTO
Owner SHARP KK
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